IMO, every option up there except Search and Destroy would work well. VIP is already in the game, except the VIP is a NPC, so that wouldn't be too hard to implement.
KotH and CtF would fit quite nicely into the game, since CtF is basically in already and KotH would fit the game's style great.
Neutral Bomb might be a dumb choice, since Soldiers can do that as well, but meh. I think Neutral bomb is pretty fun. Search and Destroy is only a CoD game type and is a [censored] one at that, so [censored] that game type.